74 lines
2.4 KiB
Java
74 lines
2.4 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8155635
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* @modules java.base/jdk.internal.misc
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xbatch -XX:-TieredCompilation compiler.unsafe.MixedUnsafeStoreObject
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* @run main/othervm -Xbatch compiler.unsafe.MixedUnsafeStoreObject
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*/
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package compiler.unsafe;
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import jdk.internal.misc.Unsafe;
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public class MixedUnsafeStoreObject {
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static final Unsafe UNSAFE = Unsafe.getUnsafe();
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static final long F_OFFSET;
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static {
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try {
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F_OFFSET = UNSAFE.objectFieldOffset(T.class.getDeclaredField("f"));
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} catch (Exception e) {
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throw new Error(e);
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}
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}
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static class T {
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Object f;
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}
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public static void testFieldInstanceObject(Object t) {
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for (int c = 0; c < 20000; c++) { // trigger OSR compilation
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// java/lang/Object+12 *
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// _base = InstPtr, _ptr = BotPTR, _field = NULL, mismatched = true
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UNSAFE.putReference(t, F_OFFSET, "foo");
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}
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}
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public static void testFieldInstanceT(T t) {
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for (int c = 0; c < 20000; c++) { // trigger OSR compilation
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// ...$T+12 *
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// _base = InstPtr, _ptr = BotPTR, _field = T.f, mismatched = false
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UNSAFE.putReference(t, F_OFFSET, "foo");
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}
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}
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public static void main(String[] args) {
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testFieldInstanceObject(new T());
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testFieldInstanceT(new T());
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}
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}
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